Purification of gases



, G.KRAUSE PURIFI 'CATI'ON 0F GASES.

APPLICATION FILED NOV 24' 19T3- RENEWED OCT. 22, 1920.

1,377,205. v Patpnted May 10,1921.

GEORG KRAUSE, OF MUNICH, GERMANY.

PURIFICATION OF GASES.

memos.

Specification 01' Letters Patent.

Patented May in. 1921.

. Application filed November 24, 1913, Serial No. 802,701. RenewedOctober 22, 1920. Serial No. 418,775.

T all whom it may concern Be it known that I, Gnono KRAUsn, a subject ofthe German Emperor, residing at Munich, in Germany, have inventedcertain new and useful Improvements Relating to the Purification ofGases, of which the fol this process the electrodes at the points ofcharging and precipitation'are of opposite polarity, the result beingthat said electrodes have to be spaced comparatively far apart in orderto prevent electric compensation by direct sparking. This arrangementonly allows of a small part of the area for the passage of the gas to beutilized for the action of the electrodes, so that a considerable amountof impure matter passes through the apparatus without being electricallycharged and precipitated, and the apparatus is consequently ineflicient.

This disadvantage is avoided in the process according to the presentinvention by using electrodes of like polarity at the charging point,and also electrodes of like polarity at the precipitation point, so thatthe area for the passage of the gas can be fully utilized for theeffective action of the electrodes without danger of electriccompensation due to direct sparking across same.

The electrodes at the charging point are of a different polarity fromthose at the precipitation point, so that a field is formed between thetwo sets of electrodes.

A further feature of the invention is that the velocity of the gases islower at the points where charging and precipitation occurs than duringtheir passage from the charging point to the precipitation point. Therapid passage of the charged particles to the precipitating chamberprevents weakening of the charge, while suflicient time is allowed forthe charging and precipitation of the gases.

Another novel feature of the invention reof the charging electrodes witha' view to the most eflicient utilization of the area for the passage ofthe gas, said electrodes being preferably arranged parallel to thedirection of the flow of gas and the other setof electrodes beingpreferably perpendicular to the current of gas, and said electrodesconsisting preferably of wires.

During the course of operation of the apparatus, the precipitatingelectrodes are likely to become fouled or-covered with the separatedsolidmatter. lVhen the electrodes are in this condition they arepractically inoperative for the desired purpose, and clean electrodesmust be substituted. In order that such substitution may be effectedwithout stoppage of operation, I may form the precipitating electrodesas oppositely extending units, pivotally mounted, so that either unitmay beswung into operative position. when the other unit requirescleaning. In this form of the device, only the electrode unit inoperative position need be charged with current.- i

Two embodiments of the invention are shown in the accompanying drawings,in which Figure 1 is a diagrammatic longitudinal section of one form ofconstruction. and

Fig. 2 is a diagrammatic cross section of a double precipitatingelectrode system.

a is the charging chamber, in which the chargingelectrodes I) aredisposed. c is the inlet passage to the collecting chamber 8,

.in which latterare disposed the precipitating electrodes d, which, haveto. be passed by the particles moving in the direction indicated by thearrows. Thecross-section of said chambers is greater than that ofsaidinlet passage. Fig. 2 shows a double precipitating electrode system 6 fwhich is pivoted at g, so that either of the electrode systems. whichare insulated from each other. can be brought in front of the inletpassage c to the aforesaid collecting chamber.

What I claim as my invention and desire to secure by Letters Patent ofthe United States is y Apparatus for purifying gas, comprising acharging chamber and aprecipitating chamber with-a passage of restrictedarea therebetween, a plurality of electrodes of like polarity arrangedin said charging chamber in the path of the gases adapted to flowtherethrough, and a plurality of electrodes of like polarity arranged insaid precipitat- In witness whereof I have signed this ing chamber inthe path of the gases adaptspecification in the presence of two Wited-toflow thereinto through said passage nesses.

from said charging chamber, the electrodes GEORG KRAUSE. in one of saidchambers being of a different Witnesses: polarity With respect to theelectrodes in the A. W. WV. CoTTER,

other of said chambers. RICHARD LEMP.

